Update tox.ini to run voting tests by default
Update tox.ini to run voting tests by default

When a developer runs `tox`, they should see the results which will be
voting in gerrit.

Change-Id: I4964b674a1317f454739ef69505c985dc323f845

gforcada/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,wikimedia/integration-jenkins-job-builder,wsoula/jenkins-job-builder,wsoula/jenkins-job-builder,gforcada/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,puppetlabs/jenkins-job-builder,gforcada/jenkins-job-builder,OSSystems/jenkins-job-builder,wsoula/jenkins-job-builder,puppetlabs/jenkins-job-builder,wsoula/jenkins-job-builder,gforcada/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,puppetlabs/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,OSSystems/jenkins-job-builder,puppetlabs/jenkins-job-builder,gforcada/jenkins-job-builder,OSSystems/jenkins-job-builder,OSSystems/jenkins-job-builder